CN106164406A - The tool-face of the downhole tool with the drill string friction of reduction controls - Google Patents
The tool-face of the downhole tool with the drill string friction of reduction controls Download PDFInfo
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- CN106164406A CN106164406A CN201480077078.1A CN201480077078A CN106164406A CN 106164406 A CN106164406 A CN 106164406A CN 201480077078 A CN201480077078 A CN 201480077078A CN 106164406 A CN106164406 A CN 106164406A
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- motor
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- steerable
- drill string
- drilling rod
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/067—Deflecting the direction of boreholes with means for locking sections of a pipe or of a guide for a shaft in angular relation, e.g. adjustable bent sub
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/003—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings with electrically conducting or insulating means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/02—Fluid rotary type drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/04—Electric drives
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/16—Plural down-hole drives, e.g. for combined percussion and rotary drilling; Drives for multi-bit drilling units
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/005—Below-ground automatic control systems
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B44/00—Automatic control systems specially adapted for drilling operations, i.e. self-operating systems which function to carry out or modify a drilling operation without intervention of a human operator, e.g. computer-controlled drilling systems; Systems specially adapted for monitoring a plurality of drilling variables or conditions
- E21B44/02—Automatic control of the tool feed
- E21B44/04—Automatic control of the tool feed in response to the torque of the drive ; Measuring drilling torque
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B45/00—Measuring the drilling time or rate of penetration
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/06—Deflecting the direction of boreholes
- E21B7/068—Deflecting the direction of boreholes drilled by a down-hole drilling motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/06—Measuring temperature or pressure
- E21B47/07—Temperature
Abstract
Disclosing a kind of system and method for probing, described system includes having the drill string of at least one drilling rod, shaft bottom assembly and drill bit.Described shaft bottom assembly includes the downhole mud motor for rotating described drill bit, and is coupled in the steerable motor between described MTR and described drilling rod.Described downhole mud motor includes curved envelope.Described drilling rod rotates to minimize friction continuously, and no matter whether described drill bit is by using rotary drilling or utilizing the probing of described downhole mud motor to rotate.Tool face orientation can be controlled by operating described steerable motor under described drilling rod speed but in relative direction of rotation, thus keep described MTR and curved envelope static relative to stratum.Steerable motor speed can be increased or decreased to adjust tool face orientation.
Description
Technical field
The disclosure relates generally to oil field equipment, and relates in particular to downhole tool, drilling system and on ground
The drilling technique of pit shaft is drilled in Ceng.More particularly still say, rub it relates to reduce drill string when using down-hole motor probing
Wiping power.
Background technology
Drilling system can be guided generally use there is drilling rod, shaft bottom assembly and the drill string of drill bit.Shaft bottom assembly includes by boring
Well liquid energy supply is with the downhole mud motor of rotary drilling-head and makes the angled curved envelope of drill bit disalignment.Shaft bottom assembly by
Drill string carries, and described drill string extends to earth surface and provides drilling fluid for shaft bottom assembly.
Conventional rotary drilling technology is generally used to drill the straight section of pit shaft.Drill string is revolved by the rig of surface
Turn, and shaft bottom assembly and its downhole mud motor rotate together with drill string with crooked joint.But, in order to drill pit shaft
Bending section, uses downhole mud motor to carry out rotary drilling-head, and the shell of off-axis bending guide drill bit away from pit shaft axis with
Thering is provided slight curving wellbore section, wherein said bending realizes desired skew or deflecting angle.When drilling bending section, drill string
Do not rotate, and slide only along pit shaft.
The direction of probing or the change of pit shaft track are determined by the tool-face angle of drill bit.Outside tool-face angle is by bending
The direction that shell is oriented determines.Tool-face can be adjusted from ground by rotating drill string.Operator attempts by using on rig
Turntable or top drive moment of torsion or angle correct are applied to drill string and maintain suitable tool-face angle.
Directional drilling is characterised by that considerably long drill string can be in close contact with well bore wall and be supported by well bore wall, thus
Form substantial amounts of drag.When drill string does not rotates but is in slip drilling mode, frictional force increases severely.This type of drill string frictional force makes
Must be difficult to apply on drill bit optimal rate that suitable weight realizes penetrating and facilitate stick-slip phenomenon.It addition, drill string
Frictional force can cause the axial force needed for making drill string slide to be so great that, and when drill string departs from, downhole mud motor may
Stall.Additionally, when applying drill string angle correct to attempt to correct for tool-face angle in surface, the change of substantial amounts of angle can be led to
Cross triboabsorption, and do not change tool-face angle, and stick-slip can cause angle school, operator's toning target tool face
Just.
In some cases, can revolve before and after between the first angle and the second angle or between counter torque value
Turn ground swing drill string and reduce drill string friction.But, swing may reduce friction deficiently.May be by mistake it addition, swing
Change the tool-face angle of drill motor, thus cause pit shaft sizable before and after vacillate, the pit shaft flexibility that increases and card
Live the risk of the increase of pipe.
In other cases, rotation can be used for replacing downhole mud motor and curved envelope by guider.Rotation can be led
In the desired direction drill bit is applied the off-axis bias force of regulation to device, in order to when whole drill string rotating, directional well is carried out
Guide.Therefore, when minimizing drill string friction, desired tool-face and angle of bend can be maintained.When guiding is not desired,
Rotation can be configured to close off-axis biasing by guider.Because there is not the drill string sliding fortune relating to rotational steerable system
Dynamic, so greatly reducing and traditional problem that slide (such as stick-slip) is relevant and Towing Problem.But, rotation can guider
It is probably complexity and costliness.
Accompanying drawing is sketched
Referring to the drawings each embodiment is described in detail, in the accompanying drawings:
Fig. 1 is the figure of the exemplary drilling system illustrating the many aspects according to the disclosure；
Fig. 2 is the figure of the shaft bottom assembly of the Fig. 1 illustrating the many aspects according to the disclosure；
Fig. 3 is the figure of the another exemplary drilling system illustrating the many aspects according to the disclosure；
Fig. 4 is the figure of the exemplary electrical action-oriented motor illustrating the many aspects according to the disclosure；
Fig. 5 is the figure of the exemplary flow diverter illustrating the many aspects according to the disclosure；
Fig. 6 is another figure of the exemplary flow diverter illustrating the many aspects according to the disclosure；
Fig. 7 is the figure of the element of the exemplary electrical action-oriented motor illustrating the many aspects according to the disclosure；
Fig. 8 is another figure of the cross sectional view of the amplification illustrating the line 8-8 acquisition along Fig. 7, it is shown that electronic guiding horse
The exemplary stator reached and rotor are arranged；
Fig. 9 is the block diagram of the motor controller for controlling electronic steerable motor of the many aspects according to the disclosure；
Figure 10 is the schematic diagram of the exemplary inverter circuit illustrating motor controller；And
Figure 11 is to illustrate the probing simultaneously being continued rotary drill rod by maintenance controlled tool face according to an embodiment
The flow chart of the illustrative methods of pit shaft.
Describe in detail
Present disclosure can repeat the reference number in various example and/or letter.This repeat be in order to simple and
For the sake of Qing Chu, and itself do not indicate the relation between the various embodiments discussed and/or configuration.As used herein, dynamic
Word " couples " and " connection " and their synonym can include being directly connected to and being indirectly connected with both.
Space relative terms as " ... under ", " in ... lower section ", " bottom ", " in ... top ", " top ", " well
On ", " down-hole ", " upstream ", " downstream " etc. herein perhaps to be easy to describe and use to describe one as illustrated in the drawing
Element or feature structure and another element or the relation of feature structure.Described space relative terms is intended to encompass is retouched in figure
The orientation orienting the different equipment in use or in operation painted.For example, if the equipment in figure overturns, then retouch
State as being then oriented in other elements or feature " top " at the element of other elements or feature " below " or " lower section ".Cause
This, exemplary term " below " can comprise both orientations of above and below.Can otherwise carry out orientation equipment and (rotate 90
Degree or orient at other), and can similarly respective explanations space used herein relative descriptors.
Fig. 1 is the front view of the partial cross section of the drilling system 20 including shaft bottom assembly 90 according to an embodiment.
Drilling system 20 can include land rig 22.But, the religious doctrine of the disclosure can satisfactorily with offshore platform, semi-submersible type, brill
Visit ship and any other drilling system of the pit shaft extending through one or more down-hole formation can be formed satisfactorily explicitly
Use.
Rig 22 can be located near well head 24.Rig 22 can include turntable 38, rotation drive motor 40 and and pit shaft
Other equipment that the rotation of the drill string 32 in 60 is associated.Ring bodies 66 be formed at the outside of drill string 32 and pit shaft 60 internal diameter it
Between.For some are applied, rig 22 may also include top drive 42.Also preventer can be provided at well head 24 (the clearest and the most definite
Illustrate) and with probing other equipment of being associated of pit shaft.
The lower end of drill string 32 includes shaft bottom assembly 90, and it carries rotary drilling-head 80 at far-end.Drilling fluid 46 can be by one
Individual or multiple pump 48 pumps by conduit 34 and the upper end extended in well head 24 that is pumped into drill string 32 from hopper 30.Bore
Well liquid 46 then flows through the most internal the 33 of drill string 32, by shaft bottom assembly 90, and from being formed at rotary drilling-head 80
Nozzle exits.At the bottom 62 of pit shaft 60, drilling fluid 46 can mix with earth cuttings and other downhole fluids and chip.Drilling well
Liquid mixture flows upwards through ring bodies 66 subsequently, so that earth cuttings and other down-hole chips return to surface.Conduit 36
Fluid can be made to return to hopper 30, but various types of filter screen, filter and/or centrifuge (being not explicitly depicted) can provide
Earth cuttings and other down-hole fragments were removed before making drilling fluid be back to hopper 30.Various types of pipelines, pipe
And/or flexible pipe can be used to form conduit 34 and 36.
According to an embodiment, shaft bottom assembly 90 includes downhole mud motor 82, and it includes the housing 83 of bending.Down-hole
MTR 82 is coupled to steerable motor 84 and is driven by.In one embodiment, steerable motor 84 is electronic horse
Reach.Shaft bottom assembly 90 may also include other instruments 91 various, such as provides well logging or measurement data and from bottom pit shaft 60
Those instruments of other information.Measurement data and other information can use drilling measuring technology to pass on from the end 62 of pit shaft 60,
And it is converted into the signal of telecommunication in well surface, with except other aspects external monitoring drill string 32, shaft bottom assembly 90 be associated
The performance of rotary drilling-head 80.
Fig. 2 is the front view of shaft bottom assembly 90, and described shaft bottom assembly 90 includes downhole mud motor 82, and it can include successively
Top power supply section 86 and lower bearing section 88.Power supply section 86 can be the positive displacement motor of Moineau type, and it uses
The leaflet helical rotor of cincture and rotation in elastic stator, described elastic stator has a leaflet more than rotor.Rotor leads to
Cross the fluid pressure difference across power supply section to drive rotation.This type of MTR can produce and usually can guide the height needed for application
Moment of torsion and low velocity.Alternately, the vane type drilling well that power supply section 86 may be included at high speed and runs under low moment of torsion is surged
Power turbine, also referred to as turbodrill.Lower bearing section 88 includes thrust bearing and journal bearing (not shown).Lower bearing district
Section 88 can include having the rotor of power supply section 86 is connected to drill bit 80 for the top constant velocity cardan joint of bit and
The rotor (not shown) of bottom constant velocity cardan joint.Constant speed axle allows the off-axis bending of the shell of MTR 82, and allows
The nutating of Moineau type rotor.
Shaft bottom assembly 90 includes steerable motor 84.Steerable motor 84 can be fluid powered motor, as described above, such as
Positive displacement Moineau or turbodrill motor, or electro-motor.Steerable motor 84 is couple to downhole mud motor 82 and drives
Dynamic described downhole mud motor 82.Then, steerable motor 84 is couple to the drilling rod 31 of drill string 32 and is driven by described drilling rod 31.
In one embodiment, the stator of steerable motor 84 is connected to drilling rod 31, and the rotor of steerable motor 84 is connected to down-hole
MTR 82.In another embodiment, the rotor of steerable motor 84 is connected to drilling rod 31, and the determining of steerable motor 84
Son is connected to downhole mud motor 82.
Although discussing embodiment presented herein in terms of using drilling rod, but those skilled in the art recognizing
Other Transfer method (pipe the most continuously) the most also can be substituted and contained in the meaning of term drilling rod.
In operation, drilling rod 31 is as rotated up by the first party indicated by arrow 70, and this is the most in a first direction
Rotatable stator or steerable motor 84.When drilling straight wellbore section, steerable motor 84 is not provided power, and described in lead
Rotate not with respect to its stator to the rotor of motor 84.Similarly, downhole mud motor 82 power-off is made.Therefore, exist when drill string 32
When rotating on first direction 70, drill bit 80 is to rotate in conventional rotary drilling mode in a first direction 70.But, when probing bending
Wellbore section time, when on drilling rod 31 in a first direction 70 rotate time, steerable motor 84 is with the rotation equal with the speed of drilling rod 31
Rotary speed is upper in the direction (as by arrow 72 indicated) relative with first direction to be rotated.Therefore, downhole mud motor 82 and drill bit
The tool-face of 80 keeps static, even if being also such when drilling rod 31 rotates relative to stratum.Owing to drilling rod rotates continuously, drill string
Friction is greatly reduced.Additionally, substantially improve hole cleaning feature, because continuous print drilling rod rotates contributes to preferably removing rock
Bits.
In one embodiment, can periodically adjust rotary speed or the speed of drilling rod 31 of steerable motor 84, to provide
Small mismatch relative to the higher or lower speed of other speed.By this way, can be rotating slowly as required, orient
With the tool-face readjusting drill string 80.Once aligning tool face angle, again coupling steerable motor 84 and the speed of drilling rod 31,
And tool-face angle keeps stable.
The various sensors being discussed in greater detail below and motor control system can be used for regulating the speed of steerable motor 84.
Such as, can measure and balance speed and/or the moment of torsion of drilling rod 31.For maintaining traditional orientation device system of tool-face can be easy
Ground is applicable to control steerable motor 84.
Fig. 3 is facing of the partial cross section of the drilling system 20 ' including shaft bottom assembly 90 ' according to an embodiment
Figure, wherein the pipe-in-pipe drill string 32 ' of Reelwell boring method is for the conventional drill string 32 of alternate figures 1.Drill string 32 ' includes coaxially
The inner tube 110 that is arranged in outer tube 120.That inner tube 110 and outer tube 120 can be off or concentric.Closed loop flow path 53 limits
It is scheduled between inner tube 110 and outer tube 120, and internal flow path 54 is limited in the inside of inner tube 110.Additionally, ring bodies
Between 66 outsides being limited to drill string 32 ' and the inwall of pit shaft 60.It is positioned at the flow diverter 210 of proximate distal ends of drill string 32 ' by ring
Shape body 66 fluidly connects with internal flow path 54.
As the drilling system 20 of Fig. 1, the drilling system 20 ' of Fig. 3 can include being positioned at land, offshore platform, semi-submersible type are put down
Rig 22 on platform, drilling ship etc..Rig 22 can be located near well head 24 and can include turntable 38, rotation drive motor 40
And other equipment being associated with the rotation of the drill string 32 ' in pit shaft 60.For some are applied, rig 22 can include top
Drive motor or top drive unit 42.Also can provide at well head 24 preventer (being not explicitly shown) and with probing pit shaft phase
Other equipment of association.
The lower end of drill string 32 ' includes that shaft bottom assembly 90 ', described shaft bottom assembly 90 ' carry rotary drilling-head 80 at far-end.
Drilling fluid 46 can be pumped into the extending in well head 24 of drill string 32 ' from hopper 30 by conduit 34 by one or more pumps 48
Upper end.Drilling fluid 46 then flows through the closed loop flow path 53 between inner tube 110 and outer tube 120, by shaft bottom assembly 90 ', and
And exit from the nozzle being formed at rotary drilling-head 80.At the bottom 62 of pit shaft 60, drilling fluid 46 can with earth cuttings and
Other downhole fluids and chip mixing.Drilling fluid mixed thing flows upwards through ring bodies 66 subsequently, by flow diverter 210, and
And upwardly through the internal flow path 54 provided by inner tube 110, so that earth cuttings and other down-hole chips are returned to surface.
Conduit 36 can make fluid return to hopper 30, but various types of filter screen, filter and/or centrifuge (being not explicitly depicted)
Can provide before making drilling fluid be back to cheat 30, remove earth cuttings and other down-hole fragments.Various types of pipelines, pipe
Son and/or flexible pipe can be used to form conduit 34 and 36.
Fig. 4 is the axial, cross-sectional view of the electronic steerable motor 84 ' according to an embodiment.Electronic steerable motor 84 ' has
There are variable velocity and torque capability.May also provide optional planetary gear (not shown), to contribute to desired speed and moment of torsion
Output.
Electronic steerable motor 84 ' can connect into the part of pipe-in-pipe drill string 32 ', and described pipe-in-pipe drill string 32 ' includes inner tube
110, outer tube 120 and flow diverter 210.As described in more detail below, electronic steerable motor 84 ' can include motor case 160, tool
The stator module 150 having stator winding 140, the rotor 170 with rotor magnet 180, carry motor controller 370 electronics insert
Part 340 and current limiter 230.
In certain embodiments, it is provided that the electric power for unidirectional current or single-phase alternating current can pass through inner tube 110 and outer tube 120
Along the length of drill string 32 ' from surface delivery.Inner tube 110 is " hot " power conductor and outer tube 120 ground connection, because outer tube 120
It is likely to the rig conductive contact with ground connection.The outer surface of inner tube 110 and/or the inner surface of outer tube 120 can be coated with electric insulation
Material (is not explicitly depicted), to prevent inner tube 110 from passing through the short circuit to outer tube 120 of drilling fluid or other contact points.Dielectric insulation
The example of material includes polyimides, politef or other fluoropolymers, nylon and ceramic coating.Inner tube 110 naked
Metal is only exposed to the region of sealing and is protected against drilling fluid.Can only expose the naked metal of inner tube 110 with edge
The electrical connection that the length of drill string 32 ' produces the next joint of inner tube.This type of region can be filled with air or non-conductive stream
Body (such as dielectric oil), or conductor fluid (such as water-base drilling fluid), as long as not having short circuit current from inner tube 110 to outer tube 120
Path.
Fig. 5 is the detailed axial, cross-sectional view on the top of the bottom of drill string 32 ' and electronic steerable motor 84 ', it is shown that Fig. 4's
Flow diverter 210.Fig. 6 is the view in transverse section of the line 6-6 acquisition along Fig. 5, it is shown that the top of flow diverter 210.Reference Fig. 4-
6, flow diverter 210 is arranged on the near top of electronic steerable motor 84 '.Flow diverter 210 is by outer tube 120 and inner tube 110 electric insulation.
Flow diverter 210 can be by pottery or have the metal alloy of dielectric insulation coating and make.Pottery to quicksand, landwaste, scrap and from
Ring bodies 66 flow to other solids of inner flow path 54 and provides highly corrosion resistant, and described inner flow path 54 is by the flowing to surface
Inner tube 110 on return path is provided.By such as CARBOThe pottery that company manufactures is characterised by being applicable to be formed
The useful molding technique of flow diverter 210.
Sealing member 320 can be located on top and the bottom of flow diverter 210, to stop the ring between inner tube 110 and outer tube 120
Flow and drain in the minds of in inner tube 110.Flow diverter 210 is bonded to inner tube 110 and outer tube 120, in order to maintain suitable rotation
Alignment.
During operation, drilling fluid 46 (Fig. 3) flows along the closed loop flow path 53 between inner tube 110 and outer tube 120, and
Flow through the kidney shape passage 211 in flow diverter 210.Meanwhile, from the ring bodies 66 being formed between pit shaft 60 and outer tube 120
Drilling fluid and soil landwaste enter inner tube 110 by cross-port 212.Inner tube 110 is at flow diverter 210 or covered immediately below it
Living or block, flowing up in inner tube 110 so that being only capable of from the fluid of ring bodies 66.
In the lower section of flow diverter 210, the bottom of the inner tube 110 that the drilling fluid flowed downward can be redirect to by port 117
In central passage 115.Now, the drilling fluid 46 flowed downward leaves inner tube 110 and enters that to be formed at steerable motor 84 ' interior
In longitudinal center's conduit 118.
In one embodiment, in addition to being positioned at the contact 116 sealing moist join domain 330, inner tube 110 has
There is the electric insulation coating layer along its inner length.Contact 116 is the short section of non-insulating inner tube 110, described contact 116 and electronics
Plug-in unit 340 coordinates, to provide electric current by motor controller 370 to electronic steerable motor 84 '.Electronic package 340 also can with remove
Coating electric insulation outside the region that coordinates with contact 116.Conductor wire winding spring 350 can be used for encouraging inner tube 110 and electricity
Electrical connection between subboard 340.Although being not explicitly depicted, electronic package 340 can have orientation pin, ratchet etc., to maintain
Suitable rotary alignment.
The motor controller 370 carried by electronic package 340 can be positioned on the top of stator winding 140, with control speed,
Moment of torsion and other various aspects such as electronic steerable motor 84 '.Electronic building brick 370 can be by the signal superposed with electric power
To carry out two-way communication with surface, described electric power is transported by the two-conductor path formed by inner tube 110 and outer tube 120.Separately
Outward, electronic building brick 370 can transmit between surface with module and communicate and data, and described module is positioned at the lower section of motor to support
Well logging during and/or measurement while drilling, guiding and similar system.Feedthrough conductor 375 can support this type of communication.
It is interior to protect electronic device that motor controller 370 may be housed in pressure controlled cavity.Motor controller 370 can be coated with
It is covered with ceramic coating to be filled with oil with permission cavity, and balances with ambient pressure about, thus allow relatively thin shell wall,
Thus leave more space for electronic device and the more preferable cooling of electronic device is provided.
Stator winding 140 and the most optional is led to by the conductor 375 of the gland filling at the housing interface 385 that seals
Sensor.Electronic package 340 can include one or more earth lead 360, and described earth lead 360 is by the housing interface sealed
Gland at 380 is clogged.Earth lead 360 carries current supply circuit for outer tube 120.Earth lead 360 can by o-ring 381 and 382 or
Person is sealed with drilling fluid by additive method, with the damage preventing corrosive atmosphere from causing.
Fig. 7 is middle part and the axial, cross-sectional view of bottom of electronic steerable motor 84 '.With reference to Fig. 4 and Fig. 7, drilling fluid 46 (figure
3) center of electronic package 340 it is downward through by central passage 118.Now, the drilling fluid flowed downward is divided into two flowings
Path.First flow path continues the central passage 118 along rotor 170 downwards, and finally drops to downhole mud motor
82 and drill string 32 ' bottom at drill bit 80, exit drill string 80 at the first flow path described herein and start it and pass through well
Canister ring shape body 66 (Fig. 3) returns back up to the road of flow diverter cross-port 212.Second flow path is defined through being positioned at and turns
At the top of son 170 or neighbouring current limiter 230, by between excircle and the inner periphery of stator module 150 of rotor 170
Gap and by bearing assembly 390, finally exits the electronic steerable motor 84 ' at the bottom of motor case 160.
Current limiter 230 is designed to through too small amount of drilling fluid to cool down stator winding 140, and lubricates electronic guiding horse
Reach lower radial bearings and the thrust bearing assembly 390 of 84 '.Such as, current limiter 230 can have and is formed therethrough which to allow drilling well
The small-gap suture flow path that liquid stream is dynamic.Current limiter 230 can be by such as tungsten carbide or cobalt-base alloys (such as stellite)
Corrosion resistant material is made.In one embodiment, current limiter 230 also can double as top journal bearing 240.Implement at other
In scheme, it is possible to provide individually top journal bearing.Journal bearing 240 can include rubber peculiar to vessel, polycrystalline diamond compact, melt
Melt tungsten carbide or other suitable coating or bearing material.
While shown as being positioned at the top of rotor 170, but current limiter 230 can be positioned on appointing along arbitrary flow path
The most square, provide the cooling of sufficient stator and bearing to moisten as long as the drilling fluid of proper proportion flows between two flow paths
Sliding, the drilling fluid simultaneously remaining sufficient flow to downhole mud motor 82 and drill bit 80 (Fig. 3).
Can provide optional intermediate radial bearing 380, described intermediate radial bearing can be by drilling fluid as described above
Flowing lubricates.Elastomer bearing for ship, roller, ball, axle journal or other kinds of bearing can be used for intermediate radial bearing 380.
Lower bearing assembly 390 can be provided for the radial and axial support to rotor 170.
Rotor 170 extends beyond the bottom of motor case 160 and terminates at adapter 300, to drive down-hole motor 82
(Fig. 3).Although adapter 300 is shown as pin connector, but boxlike adapter, spline can be suitably used or other are suitable
Coupling.
Fig. 8 is the view in transverse section of the line 8-8 acquisition along Fig. 7.With reference now to Fig. 4, Fig. 7 and Fig. 8, can be with fan-shaped wedge
Stator winding 140 is wrapped in stator module 150 by mode.Stator module 150 can include being processed by single round tube machine
Stator head 290, but for ease of manufacturing, it is possible to provide many discrete wedge shape stator heads 290, wherein stator winding 140 around
Single stator head 290 winds.Subsequently the single stator head 290 that can be welded together is assembled in motor case 160.Stator pack
It is interior to prevent from rotating against that part 150 is fixed on motor case 160.Such as, stator head 290 can with groove in outer diameter, and can
The rotation prevented between them it is bonded with motor case 160.
Stator head 290 is made up of the soft iron with high osmosis.Magnet-wire can be used to form stator winding 140, described magnet-wire
Can be by silver, copper, aluminum or be coated with any conducting element of varnish, polyether-ether-ketone (PEEK) or other dielectric materials and make.Stator
Winding 140 can form the many windings around stator head 290.Optionally, can the top of stator winding 140 be provided above fill
Closure material (such as pottery, rubber or High temp. epoxy resins) and/or described Embedding Material is embedded in stator winding 140.
This Embedding Material can be used to protect stator winding 140 from the corrosion owing to causing with contacting of drilling fluid and erosion.This
Outward, the short-circuit protection providing other is provided above the subcoat provided by magnet-wire.
Steerable motor 84 ' can include maximizing this mode of reaction torque and be installed to the fixed rotor on rotor 170 forever
Magnet 180.The advantage of rotor permanent magnet 180 is the high torque transmission in the case of not sliding or needing slip ring or commutate
Accurate control with spinner velocity.But, rotor 170 can be suitably used current-carrying winding to replace permanent magnet 180.Such as, may be used
Use short circuited inductance cage rotor or the rotor windings being received electric current by slip ring or diverter.
Electronic steerable motor 84 ' is shown as having six poles, and wherein four rotor permanent magnets 180 are arranged on rotor 170
On.But, motor type, the number of pole, commutation method, control device and winding can be suitably used and/or magnet is arranged
Modification.Such as, the number of winding and magnet, such as 12 stator poles and eight rotor magnets or three can be scaled
Individual stator poles and two rotor magnets.Suitable combination depends on a number of factors, and wants including reliability, smoothness and peak torque
Ask.
Rotor magnet 180 is characterised by high magnetic field intensity.The suitable type of rotor magnet 180 can include samarium-cobalt magnet.
In certain embodiments, rotor magnet 180 can be manufactured into wedge shape, is formed at the pit in rotor 170, although can with coupling
It is suitably used other shapes.Rotor magnet 180 also can be by being filled into the loose powder of fine magnetic particles in mould
Making, the loose powder of described fine magnetic particles is suppressed the most in a mold and sinters.During this manufacture process
Applying a magnetic field the magnetic domain of individual particle can be registered to optimal orientation.The polarity of rotor magnet 180 can be with arctic and facing outwardly
The South Pole alternately.Once set rotor magnet 180, without being sintered in position, can by various means (such as
Keeper band, sleeve, screw, slit or other securing members) they are fastened to rotor 170.
Fig. 9 is the block diagram of the motor controller 370 according to an embodiment.Motor controller 370 is ideally comprised tool
There is the processor 371 of memorizer 372, for electronic steerable motor 84 ' is monitored and controlled.Processor 371 can control some merits
Can, include but not limited to: motor starting, axle speed, output moment of torsion and winding temperature and/or drilling fluid mobile monitoring.It addition,
Processor 371 can control the transmission of motor data and drilling rod moment of torsion and the reception of speed data by communication interface 373.Communication
Interface 373 can be communicated by inner tube 110 and outer tube 120 by using slip ring or inductance coupling.Communication interface 373 is also
The such as control signal between surface and the device of the electronic steerable motor 84 ' lower section interior at BHA 90 ' and survey can be postponed
Amount data.
Processor 371 can perform the order being stored in memorizer 372.Memorizer 372 can have process by Alignment
Existing in the overall semiconductor of device 371 and/or as one or more single storage devices, described storage device includes
Random access memory, flash memory, magnetically or optically memorizer or other forms.Memorizer 372 can be additionally used in record and leads about electronic
To the performance information of motor 84 ', such as winding temperature, drilling fluid temperature, axle speed, power output, moment of torsion output, voltage, around
Pressure on the either side of group electric current and current limiter 230 (Fig. 6).
In certain embodiments, it is possible to provide spinner velocity sensor 193 is with monitoring shaft position and/or speed.Such as, may be used
There is provided hall effect device to monitor shaft position and RPM by inductiopn rotor magnet 180.The letter of spinner velocity sensor 193
Number output can be routed to motor controller 370, and wherein processor 371 can automatically be assessed and adjust spinner velocity.Additionally,
When rotor 170 rotates by monitoring the position of described rotor 170, can transmit and detect slipping of pole by optimization moment of torsion.
In one embodiment, can be at the interior offer drill string elsewhere of electronic steerable motor 84 ' or shaft bottom assembly 90 '
Velocity sensor 194 (such as inertial sensor etc.), to determine the rotary speed of drill string 32 '.By this way, electronic guiding horse
Reach the speed of 84 ' to be controlled by motor controller 370, so that the speed of rotor 170 is equal with the velocity magnitude of drill string 32 ' also
And direction is relative.The speed of electronic steerable motor 84 ' can so be controlled such as to maintain constant tool face orientation.Can replace
Dai Di, it is also possible to be that the tool face orientation sensor (not shown) of inertial sensor can directly detect tool face orientation and will be anti-
Feedback is supplied to motor controller 370 for the speed controlling rotor 170.In still another embodiment, by other means
There is provided drill string 32 ' speed and or moment of torsion, and be communicated to motor controller 370, described motor control by communication interface 373
Device 370 controls moment of torsion and/or the speed output of electronic steerable motor 84 ' then.
In one embodiment, can periodically adjust the rotary speed of steerable motor 84 or the speed of drill string 32 ', to provide
Small mismatch relative to the higher or lower speed of other speed.By this way, can be rotating slowly as required, orient
With the tool-face readjusting drill string 80.Once aligning tool face angle, again coupling steerable motor 84 and the speed of drill string 32 '
Degree, and tool-face angle holding is stable.
In certain embodiments, may also provide be adjacent to winding 140 or embed winding 140 temperature sensor 195.
At least one temperature sensor 195 for each winding 140 can be used with monitoring motor temperature.Additionally, some embodiment party
In case, pressure transducer 196 can be provided above and below current limiter 230 (Fig. 7) with monitoring drilling fluid flowing.
According to an embodiment, processor 371 controls electronic steerable motor 84 ' by inverter circuit 190.Figure 10 is
A kind of upper strata schematic diagram of feasible inverter circuit 190.With reference to Fig. 9 and Figure 10, inverter circuit 190 can be by by inner tube 110
The D/C power provided with outer tube 120 (Fig. 3 and Fig. 4) is transformed into three phase mains.If single phase AC power by pipe 110,120 rather than
Thered is provided by D/C power, then inverter circuit 190 can be generally identical with the circuit shown in Figure 10, except it can include rectification
Device first alternating current to be transformed into unidirectional current.
Inverter circuit 190 uses solid electronic device for making winding switch the polarity of the electric current of 140 and hand over
Replace.Suitably solid electronic device can include switch 230 based on quasiconductor, and such as silicon controlled rectifier (SCR) (SCR), insulated gate are double
Gated transistors (IGBT), thyristor etc..Winding to can in motor as shown in Figure 8 the most opposed, its
In the phase relation of every pair of winding be to 120 ° of out-phase with any adjacent winding.Each winding is to connecting the most in parallel or series
Connect, and three phase places can be connected with Δ shape or Y shape configuration.
In order to maximize motor power, the power supply ripple of near sinusoidal can be generated by processor 371 and inverter circuit 190
Shape.But, other waveform shapes the most square or zigzag can be suitably used.Processor 371 is joined with inverter circuit 190
Close to provide desired direction of rotation, maintain the PHASE SEPARATION of each winding pair, frequency is set and (includes when changing motor speed
Frequency is made to be gradually increasing with acceptable speed and be gradually reduced), and control the power level arriving winding to optimize to constant speed
Moment of torsion transmission under Du.Can by change be applied to the electric current of winding pair, voltage or both and/or change the work of each period of wave
The each function in these functions is realized as the cycle.
Microprocessor 371 can maintain pulse width and the phase angle of all three phase place for power supply, and will timing
Signal is sent to inverter circuit 190 to generate the power signal being applied to winding 140.In one embodiment, electricity is driven
Road 197 is provided to interface processor 371 by the part as inverter circuit 190, it is provided that to high-power switching device 203.
Drive circuit 197 can be low-power amplifier switch, and described low-power amplifier switch is used for providing enough electric power, with base
Semiconductor switch 203 is opened and closed in exporting from the logic of processor 371.
Figure 11 is the flow chart illustrating the drilling method according to an embodiment.Each step in flow chart is illustrated
For horizontal pane, described horizontal pane indicates state or the situation of the various piece of drill string 32,32 '.Specifically, each step limits
The following rotation relative to geo-logical terrain: drilling rod 31,110,120；Tool-face, it is by the bending of downhole mud motor 82
The orientation of shell 83 is limited；And drill bit 80.The rotation of each parts is described by rectangle, and non-rotating next by ellipse
Describe.Each step also defines steerable motor 84,84 ' and/or whether downhole mud motor 82 is being run, the most each motor
Whether rotor rotates at the shell relative to motor, and whether this can rotate unrelated relative to geo-logical terrain with the shell of motor." beat
Open " or running status described by rectangle, and "Off" state is described by ellipse, at described closed mode rotor not
Rotate relative to shell.
Step 401 is shown in the original state of drill string 32,32 ' before actively drilling, and wherein drilling rod 31,110,120 does not revolves
Turn and steerable motor 84,84 ' and downhole mud motor 82 are both closed.Therefore, motor case does not rotates, work
Tool face orientation does not rotates, and drill bit 80 does not rotates.
In step 405 place, get out the straight section of pit shaft with conventional rotation mode.Steerable motor 84,84 ' is maintained at pass
Closed state.Drilling rod 31,110,120 turns clockwise with given speed N, and downhole mud motor 82 is with given speed P
Turn clockwise.Therefore, the motor case of both steerable motor 84,84 ' and downhole mud motor 82, and tool face orientation is complete
Portion is all turned clockwise with speed N by drilling rod 31,110,120.Drill bit 80 turns clockwise with the group speed of N+P.Due to
Throw face orients, and pit shaft keeps straight and drills with the diameter somewhat amplified.
When the transition branch road that expectation probing tilts, in step 409 place to, first tool-face is forwarded predetermined orientation.Right
Steerable motor energy supply and make its spinner velocity gradually rise to speed M counterclockwise, the most described speed M can
Slightly it is slower than speed N of drilling rod 31,110,120, but rotates in an opposite direction.The shell of steerable motor 84,84 ' relative to
Stratum turns clockwise with speed N, but the shell phase of the downhole mud motor 82 driven by the rotor of steerable motor 84,84 '
Stratum is turned clockwise with the slowest speed N-M.Therefore, tool face orientation can be rotating slowly, until it reaches pre-
Fixed orientation.In an exemplary embodiment, tool face orientation sensor can be used for determining that tool face orientation has reached predetermined fixed
To.
When tool face orientation reaches its predetermined orientation, in step 413 place, maintain by running steerable motor 84,84 '
Predetermined orientation, so that the rotor of described steerable motor 84,84 ' rotates counterclockwise with speed N, described speed N and drilling rod 31,
110, the speed of 120 is identical.In one embodiment, closed-loop control system can be provided with as motor controller 370
The tool face orientation sensor of part, can become constantly adjust up or down if desired by described tool face orientation transducer arrangements
The spinner velocity of steerable motor 84,84 ', to maintain predetermined tool face to orient.
Setting up predetermined tool face orientation and downhole mud motor 82 is being powered so that drill bit 80 turns clockwise with speed P
In the case of Dong, in step 417 place, it is placed on drill bit 80 on the bottom of pit shaft to drill the bending section of pit shaft.When by drill bit
80 be placed on bottom time, the reaction torque from MTR 82 causes tool-face to offset counterclockwise when drill string 32,32 ' rolls tightly.
Therefore the speed changing steerable motor 84,84 ' controls the position of tool-face.When tool-face moves counterclockwise, steerable motor
84,84 ' more slowly run than drilling rod speed.When tool-face moves clockwise, steerable motor 84,84 ' must mate drilling rod or
Person runs quickly than drilling rod, so that tool-face maintains in target zone.Those skilled in the art recognizes can be according to need
Rearrange and resequence these steps, to drill pit shaft according to desired plan.
Put it briefly, it has been described that drilling system, shaft bottom assembly and the method for probing pit shaft.The embodiment of drilling system
Can generally have and include that the drill string of at least one drilling rod, shaft bottom assembly and drill bit, described shaft bottom assembly include curved envelope, coupling
Receive drill bit for the first motor of the most optionally rotary drilling-head and be coupled in the first motor with at least
For the steerable motor rotating up the first motor in the second party relative with first direction between one drilling rod.Shaft bottom assembly
Embodiment can generally have: drill bit；It is couple to drill bit for the of the most optionally rotary drilling-head
One motor, described first motor has curved envelope；And it is couple to the steerable motor of the first motor, wherein said steerable motor
May operate to rotated in a first direction by drilling rod and in the second direction relative with first direction, rotate first simultaneously
Motor, in order to control the orientation of curved envelope.Finally, the embodiment of the method drilling pit shaft can generally include offer and include
The drill string of at least one drilling rod, shaft bottom assembly and drill bit, provide curved envelope in the assembly of shaft bottom, be couple to the first horse of drill bit
Reaching and be coupled in the steerable motor between the first motor and at least one drilling rod, the position of described curved envelope defines work
Tool face orient, and make at least one drilling rod rotate in a first direction with First Speed the rotor simultaneously making steerable motor with
Rotate to control tool face orientation in the second direction that first direction is relative simultaneously.
Any foregoing embodiments can include any one in elements below or feature individually or in combination with each other: bores
Post may operate to provide to the first motor drilling fluid flowing；Described first motor is by the down-hole slurry of drilling fluid flowing power supply
Motor；Steerable motor is electro-motor；Drill string may operate to provide steerable motor by drilling fluid flowing；Drilling fluid flows extremely
A few part removes the heat produced by steerable motor；Drill string includes inner and outer tubes, said inner tube arrange within the outer tube and
Define closed loop flow path therebetween；Drill string includes being arranged on the flow diverter near the assembly of shaft bottom, and described flow diverter is by inner tube
Portion is fluidly coupled to the outside of outer tube；Inner tube forms the first electric conductor, described first electric conductor be couple to steerable motor for
Electric power is provided to steerable motor；Outer tube forms the second electric conductor, and described second electric conductor is couple to steerable motor for leading
Electric power is provided to motor；Arrange the sensor being used for measuring the rotary speed of drill string；It is operably coupled to sensor and guiding
Motor and layout control the motor controller of the spinner velocity of steerable motor for rotary speed based on drill string；Arrange and use
Sensor in the moment of torsion measuring drill string；It is operably coupled to sensor and steerable motor and arranges for based on drill string
Moment of torsion controls the motor controller of the rotor torque of steerable motor；Arrange the sensor for survey tool face orientation；Can grasp
It is couple to sensor and steerable motor and arranges the motor controller for controlling steerable motor based on sensor with making；Lead
Include at least one fluid flow path being formed therethrough which to motor, described fluid flow path is arranged in drilling rod and
Between one motor, fluid couples；First motor is downhole mud motor；Steerable motor is disposed to receive electric power from drilling rod
Electro-motor；By the first motor rotary drilling-head；With the rotor of First Speed rotary steering motor so that tool face orientation keeps
Constant；With the rotor of the second speed rotary steering motor more than First Speed so that tool face orientation revolves in a second direction
Turn；With the rotor of the second speed rotary steering motor less than First Speed so that tool face orientation revolves in a first direction
Turn；By drill string, drilling fluid flowing is provided to the first motor；Flowed to the first motor power supplying by drilling fluid；Steerable motor is
Electro-motor；Thered is provided electric current that steerable motor is powered by by least one drilling rod；And by drill string, steerable motor is carried
The steerable motor that makes at least partially flowed for drilling fluid and flowed by drilling fluid is cooled down.
The summary of the disclosure is used only for providing from glancing over technology for U.S.Patent & Trademark Office and the major part public
The method that disclosed character and main points are quickly made decision, and it individually represents one or more embodiment.
Although being shown specifically various embodiment, but the disclosure is not limited to the embodiment that illustrates.Art technology
Personnel are it is contemplated that the amendment of the embodiment above and adaptation.This amendment and fit in the spirit and scope of the disclosure.
Claims (20)
1. a drilling system, comprising:
Drill string, it includes at least one drilling rod and drill bit；
First motor, it transports along described drill string and couples between at least one drilling rod described and described drill bit, in order to phase
The most optionally rotating described drill bit at least one drilling rod described, described first motor includes outside bending
Shell, and
Steerable motor, it is coupled between described first motor and at least one drilling rod described, in order to described first direction
Described first motor is optionally rotated in relative second direction.
2. drilling system as claimed in claim 1, wherein:
At least one drilling rod described connects with described first motor fluid；And
Described first motor is downhole mud motor.
3. drilling system as claimed in claim 1, wherein:
Described steerable motor is electro-motor.
4. drilling system as claimed in claim 3, wherein:
At least one drilling rod described is in fluid communication with described steerable motor.
5. drilling system as claimed in claim 1, wherein:
Described drill string includes that inner and outer tubes, said inner tube are arranged in described outer tube and limit circulation road in-between
Footpath；And
Described drilling system also includes flow diverter, and the internal flow of said inner tube is couple to the outside of described outer tube by it.
6. drilling system as claimed in claim 5, wherein:
Described steerable motor is electro-motor；
Said inner tube forms the first electric conductor being couple to described steerable motor；And
Described outer tube forms the second electric conductor being couple to described steerable motor.
7. drilling system as claimed in claim 1, it also includes:
Rotation speed sensor, it is couple to described drill string；And
Motor controller, it is couple to described rotation speed sensor and described steerable motor, and is arranged to based on institute
State rotation speed sensor to control the spinner velocity of described steerable motor.
8. drilling system as claimed in claim 1, it also includes:
Torque sensor, it is couple to described drill string；And
Motor controller, it is couple to described torque sensor and described steerable motor, and is arranged to based on described torsion
Square sensor controls the rotor torque of described steerable motor.
9. drilling system as claimed in claim 1, it also includes:
Tool face orientation sensor, it is couple to described drill string；And
Motor controller, it is couple to described tool face orientation sensor and described steerable motor, and be arranged to based on
Described tool face orientation sensor controls described steerable motor.
10. for the method drilling pit shaft in geo-logical terrain, comprising:
The drill string including at least one drilling rod and drill bit is provided；
There is provided and transport and be coupled in described the first motor between at least one drilling rod and described drill bit along described drill string；
Thering is provided and be coupled in the steerable motor between described first motor and at least one drilling rod described, described first motor includes curved
Bent shell, the position of described curved envelope limits tool face orientation；
At least one drilling rod described is rotated in a first direction with First Speed；And
By, while rotate at least one drilling rod described in a first direction with First Speed, being rotated in and described first party
The rotor of the described steerable motor in relative second direction controls described tool face orientation.
11. methods as claimed in claim 10, it also includes:
Described drill bit is rotated by described first motor.
12. methods as claimed in claim 10, it also includes:
The described rotor of described steerable motor is rotated, so that described tool face orientation keeps constant with described First Speed.
13. methods as claimed in claim 10, wherein:
Described second speed is more than described First Speed, so that described tool face orientation rotates in this second direction.
14. methods as claimed in claim 10, wherein:
Described second speed is less than described First Speed, so that described tool face orientation rotates in said first direction.
15. methods as claimed in claim 10, it also includes:
Described first motor is provided by drilling fluid flowing via described drill string；And
Flowed to described first motor power supplying by described drilling fluid.
16. methods as claimed in claim 10, wherein:
Described steerable motor is electro-motor；And
Described method also includes by providing electric current to power described steerable motor via at least one drilling rod described.
17. methods as claimed in claim 10, wherein:
Described steerable motor is electro-motor；And
Described method also includes providing described steerable motor via described drill string by drilling fluid flowing, and by described drilling well
Dynamic at least partially described steerable motor being cooled down of liquid stream.
18. 1 kinds of shaft bottom assemblies being used for drilling pit shaft in geo-logical terrain, comprising:
Drill bit；
First motor, it is couple to described drill bit, in order to the most optionally rotate described drill bit, described first horse
Reach and there is curved envelope；And
Steerable motor, it is couple to described first motor, in order to selectivity in the second direction relative with described first direction
Ground rotates described first motor.
19. shaft bottom as claimed in claim 18 assemblies, wherein:
Described steerable motor includes at least one fluid flow path being formed therethrough which, its be arranged to described drilling rod with
Between described first motor, fluid couples；And
Described first motor is downhole mud motor.
20. shaft bottom as claimed in claim 18 assemblies, wherein:
Described steerable motor is electro-motor, and it is disposed to receive electric power from described drilling rod.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/US2014/035873 WO2015167458A1 (en) | 2014-04-29 | 2014-04-29 | Tool face control of a downhole tool with reduced drill string friction |
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| CN106164406A true CN106164406A (en) | 2016-11-23 |
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| CN (1) | CN106164406A (en) |
| CA (1) | CA2942544C (en) |
| GB (1) | GB2539576B (en) |
| MX (1) | MX359928B (en) |
| NO (1) | NO347696B1 (en) |
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| WO (1) | WO2015167458A1 (en) |
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| CN109025842A (en) * | 2018-09-25 | 2018-12-18 | 中煤科工集团西安研究院有限公司 | A kind of method and double-layer drill rod for offsetting double-layer drill rod circumferential direction frictional resistance |
| CN109296316A (en) * | 2018-10-11 | 2019-02-01 | 北京六合伟业科技股份有限公司 | A kind of rotary steering bottom hole assembly |
| CN110735598A (en) * | 2018-07-19 | 2020-01-31 | 内搏斯铂井技术美国公司 | Side saddle-shaped catapult type continuous motion drilling machine |
| CN112627728A (en) * | 2020-12-03 | 2021-04-09 | 中国地质科学院勘探技术研究所 | Drilling tool capable of adjusting face angle of directional drilling tool in underground |
| US11873685B2 (en) | 2020-09-01 | 2024-01-16 | Nabors Drilling Technologies Usa, Inc. | Side saddle traversable drilling rig |
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| AU2016386308A1 (en) * | 2016-01-13 | 2018-07-26 | Slip Clutch Systems Ltd | Apparatus for providing directional control of bore drilling equipment |
| US10240406B2 (en) * | 2016-05-31 | 2019-03-26 | Baker Hughes, A Ge Company, Llc | Dual-walled running string for electric devices with power transmission through running string |
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| US11008809B2 (en) * | 2019-01-29 | 2021-05-18 | Rival Downhole Tools, Lc | Bent housing drilling motor with counter-rotating lower end |
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Also Published As
| Publication number | Publication date |
|---|---|
| GB2539576A (en) | 2016-12-21 |
| US20170037685A1 (en) | 2017-02-09 |
| MX2016012240A (en) | 2017-01-09 |
| NO20161447A1 (en) | 2016-09-13 |
| RU2016135929A (en) | 2018-05-29 |
| WO2015167458A1 (en) | 2015-11-05 |
| RU2016135929A3 (en) | 2018-05-29 |
| GB201614507D0 (en) | 2016-10-12 |
| NO347696B1 (en) | 2024-02-26 |
| US10435951B2 (en) | 2019-10-08 |
| MX359928B (en) | 2018-10-16 |
| CA2942544A1 (en) | 2015-11-05 |
| CA2942544C (en) | 2020-06-30 |
| RU2673827C2 (en) | 2018-11-30 |
| GB2539576B (en) | 2021-02-03 |
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